the patient is a doctor from indiana who had been working for several months in saudi arabia, where there's been a traumatic increase in cases there. on april 24th, he boarded a plane and eventually made it to chicago and boarded a bus to go back to his home in muns ter, indiana, he got 6th on the -- he got sick on the 27th. what is mers? its cause by a corona virus. fatality rate, anywhere between 30 and 50%. it's spread through close contact. no sustain spread at this point. there has been some small clusters. more from the national institutes of health with more. >> people who have gotten infected and either have infected very close family members and then it stopped, it never went beyond the household and then in some health care settings there has been a situation where a person was infected and then infected the health care worker that was taking tear of them. >> and the indiana man was a doctor. the big story, a couple of minor mutations, this virus could become easily trans missable human to human. they are urgently trying to get in touch with all of those people on the aircraft and